Life is far from harmonious at Arsenal football club at the moment. The Gunners' season started brightly enough, bar defeat to Liverpool on the opening day of the season, but gradually it has become the same old sorry story and there are definitely elements of toxicity now plaguing the North London club, specifically surrounding manager Arsene Wenger. Arsenal find themselves once again fighting for fourth place, and questions have been asked over whether the players still want to play for...
Dries Mertens has emerged as one of Napoli's star performers this season, and has absolutely flourished taking over from Gonzalo Higuaín who left for Juventus last summer.
Mertens has scored 19 goals in the league, which is the same as Spurs' Harry Kane, and two more than the man he could possibly replace at Arsenal in Alexis Sanchez.
Like Sanchez, Mertens is a pacey, clinical finisher and could well be worth a punt - at 29, he is also pretty experienced and plies his trade alongside Kevin De Bruyne and Eden Hazard at international level with Belgium.
Marco Reus has been at Borussia Dortmund for just over five years now and has emerged as one of the world's top wingers which really does beg the question - could he be thinking about moving on?
History would suggest that top players do not see out their careers with Dortmund, and with that knowledge, Arsenal should be prepared to spend big on this guy if Alexis leaves.
Like the Chilean, Reus can play as a winger or a striker, and knows where the goal is and could be a better option that Douglas Costa of Bayern Munich.
At 27, the German is in the prime of his life, but one potential sticking point would be his (lack of) luck with injuries. Perfect for Arsenal, then...
Lyon hitman Alexandre Lacazette has been linked with the Gunners before, but expect that speculation to do the rounds once again if Sanchez leaves the club.
The Frenchman is currently a one-club man, and is Lyon's star man over in Ligue 1 - he has scored 23 goals in the French top flight and 29 in 35 games in all competitions.
As with all the players on this list, Lacazette has bags of pace just like Sanchez, and still has years ahead of him at 25.
As with Marco Reus at Dortmund, Lacazette has been at Lyon for long time now. Perhaps a new challenge could be on the horizon if a Sanchez-less Arsenal come in for him this summer.
Paulo Dybala is not yet world class at 23 years old, but many have tipped him to become just that later on in his career.
Once Lionel Messi hangs up his boots, expect this guy to take over the Argentine's mantle and be challenging for Ballon d'Ors year in year out, just like the Barcelona superstar.
Dybala is into his second season with Juventus now, but has made the less league appearances this season compared to Gonzalo Higuaín and Mario Mandzukic.
Massive ifs all-round, but IF Arsene Wenger leaves, as well as Sanchez, and IF Massimiliano Allegri is his replacement, reports suggest that he would want to take Dybala with him to North London.
Romelu Lukaku recently announced that he would not be signing a new deal with Everton and in-turn, sent Twitter into absolute meltdown.
The big Belgian looks every inch the real deal right now and his goal record at the age of 23 speaks for itself.
Crucially, Lukaku has been playing in the Premier League since 2011 which has to count for a lot - should Sanchez depart, the former Chelsea man would likely hardly take any time at all to settle in at the Emirates - the man has even lived in London before, so no problems there!
However Lukaku cannot play as a winger like Sanchez - nothing that another top signing wouldn't be able to fix - but he does do the whole centre forward thing pretty damn well...
No doubt about it; Arsenal should look to raid the world's top selling club for Pierre-Emerick Aubameyang if Alexis Sanchez jumps ship in the summer.
The Gabon striker has developed into one of the world's most electrifying strikers, and is expected to become the subject of a bidding war once the current season concludes.
Arsenal might need to get in there quick to seal the deal for him - the hitman has fired 23 league goals so far this season, two more than Bayern Munich's Robert Lewandowski, which is saying something.
At 6ft 2in, Auba is strong and well-balanced and that combined with his blistering speed, arguably makes him even more dangerous than Sanchez.
He has also been known to operate the flanks, so he's also pretty versatile in that respect, which can't do any harm. Alexis who?